N (%) | Patients with one or two SLNs (n = 389) | ||||
---|---|---|---|---|---|
Variable | Characteristics | Negative ALN (n = 215) | Positive ALN (n = 174) | x2/Z | P |
Demographic | |||||
X1 | Age | Â | Â | Â | Â |
< 60 | 162 (75.3) | 146 (83.9) | 4.2734 | 0.0387 | |
≥60 | 53 (24.7) | 28 (16.1) |  |  | |
 X2 | Occupation |  |  |  |  |
Manual labor | 96 (44.7) | 95 (54.6) | 4.9281 | 0.0851 | |
Mental work | 51 (23.7) | 40 (23.0) | Â | Â | |
Other | 68 (31.6) | 39 (22.4) | Â | Â | |
 X3 | Menarchea |  |  |  |  |
< 15 | 148 (68.8) | 110 (63.2) | 1.6259 | 0.2023 | |
≥15 | 52 (0.24) | 52 (29.9) |  |  | |
 X4 | Menopausal status |  |  |  |  |
Premenopausal | 121 (56.3) | 98 (56.3) | 0.0001 | 0.9933 | |
postmenopausal | 94 (43.7) | 76 (43.7) | Â | Â | |
Clinical Characteristics | |||||
 X5 | Delay in diagnosis (days)a |  |  |  |  |
0–90 | 86 (40.0) | 68 (39.1) | 0.0168 | 0.9866 | |
91–180 | 49 (22.8) | 39 (22.4) |  |  | |
181–365 | 28 (13.0) | 29 (16.7) |  |  | |
> 366 | 51 (23.7) | 37 (21.3) |  |  | |
 X6 | Tumor primary site |  |  |  |  |
Right | 119 (55.3) | 80 (46.0) | 3.3805 | 0.066 | |
Left | 96 (44.7) | 94 (54.0) | Â | Â | |
 X7 | Tumor locationa |  |  |  |  |
Upper Outer | 125 (58.1) | 113 (64.9) | 5.2315 | 0.1556 | |
Lower Outer | 34 (15.8) | 30 (17.2) | Â | Â | |
Upper Inner | 41 (19.1) | 19 (10.9) | Â | Â | |
Lower Inner | 12 (5.6) | 12 (6.9) | Â | Â | |
 X8 | Tumor Sizea |  |  |  |  |
≤2 cm | 89 (41.4) | 75 (43.1) | 0.0299 | 0.8626 | |
>  2 cm | 112 (52.1) | 91 (52.3) |  |  | |
 X9 | Pathological typea |  |  |  |  |
IDC | 199 (92.6) | 159 (91.4) | 0.1822 | 0.6695 | |
Other | 16 (74.4) | 15 (8.62) | Â | Â | |
 X10 | ERa |  |  |  |  |
(−) | 42 (19.5) | 36 (20.7) | 0.0614 | 0.8043 | |
(+) | 169 (78.6) | 136 (78.2) | Â | Â | |
 X11 | PRa |  |  |  |  |
(−) | 66 (30.7) | 55 (31.6) | 0.0213 | 0.8839 | |
(+) | 145 (67.4) | 117 (67.2) | Â | Â | |
 X12 | HER-2a |  |  |  |  |
(−) | 137 | 106 | 0.0303 | 0.8618 | |
(+) | 38 | 28 | Â | Â | |
 X13 | Triple negativea |  |  |  |  |
Yes | 15 (6.98) | 14 (8.00) | 0.1933 | 0.6601 | |
No | 188 (87.4) | 148 (85.1) | Â | Â | |
 X14 | Ki-67a |  |  |  |  |
(low) | 164 (76.3) | 133 (76.4) | 0.0521 | 0.8195 | |
(high) | 47 (21.9) | 36 (20.7) | Â | Â | |
 X15 | Tumor Gradea |  |  |  |  |
1 | 28 (13.0) | 18 (10.3) | 0.5895 | 0.5555 | |
2 | 73 (34.0) | 59 (33.9) | Â | Â | |
3 | 114 (53.0) | 95 (54.6) | Â | Â | |
 X16 | Postoperative ALNsa |  |  |  |  |
0–10 | 55 (25.6) | 53 (30.5) | −0.0294 | 0.9765 | |
11–19 | 136 (63.3) | 94 (54.0) |  |  | |
≥20 | 19 (8.8) | 25 (14.4) |  |  | |
X17 | Ratio of positive to total SLNsa | Â | Â | Â | Â |
< 0.5 | 155 (72.1) | 86 (49.4) | 20.4071 | < 0.0001 | |
≥0.5 | 60 (28.0) | 87 (50.0) |  |  |